German hardness PC material, metal textured to touch, smooth & anti-Slip.;360 degeree Full Protection:this phone case in front and black setted a tempered glass protector perfect guard your iPhone;More Grip, Less Slip: Tactile sides and back give your iPhone a more secure grip whether in your hand or on a surface.;Made of PC material that will not block the signal and it can always keep the signal full grid.;This case is specially designed for iPhone 7 Plus 5.5 inch